I would do Computer Science again because background (defined as a toolbox you can dig into opportunistically) is so important. But I never had anyone to teach

I would do Computer Science again because background (defined as a toolbox you can dig into opportunistically) is so important. But I never had anyone to teach me how to program: how to structure a problem and break it down into manageable units. I would work far harder to get intimate technical contact with peers and mentors.